Today, at the Games for Change conference, Valve's Leslie Redd and Yasser Malaika announced that they'll be giving away their hit game Portal 2 for free, via the new Steam for Schools initiative. After signing up for a beta, educators will be able to get the popular sequel, the recently launched Perpetual Testing Initiative level maker and sample levels. Students making levels won't be able to share levels outside of a physical classroom, though. For more info, head over to learnwithportals.com